From an MIT Technology Review online article:
Researchers say they’ve successfully plunged human livers to subzero temperatures and then warmed them back up.
The “supercooled” organs were still in good shape after 27 hours, adding nearly a day to how long livers can last outside the body.
The supply of donor hearts, kidneys, and livers from accident victims is sharply limited. In the US, a nationwide system of registries and transplant centers coordinates to move them around by air in coolers for what are invariably emergency surgeries.
The research is part of a wider effort to learn how to keep organs operational outside the body for longer periods of time.
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